Objectives: This study investigated the impact in survival, when repair is seen as failure or not, in anterior composite restorations with a retrospective 15-year follow-up study.
Materials and methods: Data was collected from patients' files of a private dental practice, including patients with direct composite restorations placed in anterior teeth (class III, class IV, or veneer) between January 1994 and December 2009. Data were analyzed considering or not repair as failure. Statistical analysis was performed with log rank test, Kaplan-Meier, and Cox regression (p < .05).
Results: One hundred forty-four patients' files were included, with 634 restorations. At 15 years, Class III / IV restorations showed 69% survival and 2.4% annual failure rate (AFR) when repair was not considered as failure, and 64% and 2.9% AFR, respectively, when repair was seen as failure. For direct veneers, at 5 and 10 years of follow-up, survival dropped from 85% to 74% and from 52% to 38% respectively, when repair was considered as failure. In general, restorations placed in the upper jaw showed increased risk for failure compared to the lower jaw (p < .01), and restorations in central incisors presented a higher risk for failure compared to canines (p < .01).
Conclusion: Composite repair seems a suitable alternative for class III, class IV, and veneer restorations since it was able to increase the survival of restorations performed in anterior teeth.
Clinical relevance: Composite repair for anterior restorations is a suitable restorative treatment option and presents benefits over replacement, including the preservation of sound tooth structures, reduced clinical chair time, and patient anxiety.
Keywords: Composite resins; Dental restoration; Repair; Retrospective study; Risk factors; Survival.